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ABB S203MT-Z1.6NA MCB – 3P+N – Z Curve – 1.6A
ABB 2CDO273106R0258 S203MT-Z1.6NA miniature circuit breaker, a 1.6 A 3 pole Z curve MCB from the ABB System pro M compact S200M range for overload and short-circuit protection.
Why Choose the ABB S203MT-Z1.6NA Miniature Circuit Breaker?
The ABB 2CDO273106R0258, also identified as S203MT-Z1.6NA, is a compact and dependable miniature circuit breaker (MCB) designed for overload and short-circuit protection in electrical distribution and control panel applications. As part of the ABB System pro M compact S200M series, it provides reliable current limiting protection for industrial, commercial and specialist electrical systems.
This MCB uses a Z type tripping characteristic, making it suitable for sensitive circuits where rapid magnetic tripping is required. The S203MT-Z1.6NA combines thermal overload protection with electromechanical short-circuit protection, helping safeguard cables, equipment and connected loads from damaging fault currents.
With a rated current of 1.6 A and a 3-pole configuration, the ABB S203MT-Z1.6NA is well suited to three-phase auxiliary circuits, control systems and precision electrical installations. Its DIN rail mounting design allows straightforward installation inside distribution boards, switchgear assemblies and machine control panels.
Key Advantages
- Compact miniature circuit breaker for circuit protection.
- 1.6 A rated current for low-current control and auxiliary circuits.
- 3-pole configuration for three-phase electrical protection.
- Z curve tripping characteristic for fast response to short-circuit faults.
- Current limiting design helps reduce fault energy and equipment stress.
- DIN rail mounting for fast installation in control panels and distribution boards.
Key Features
- ABB System pro M compact S200M series.
- 1.6 A nominal current rating.
- 3-pole miniature circuit breaker.
- Z type tripping curve for sensitive circuit protection.
- Thermal tripping mechanism for overload protection.
- Electromechanical tripping mechanism for short-circuit protection.
- High performance current limiting operation.
- Modular DIN rail design for electrical enclosures.
Reliable Protection for Electrical Circuits
Miniature circuit breakers such as the ABB S203MT-Z1.6NA protect electrical circuits by automatically disconnecting the supply when overloads or short-circuit faults occur. This helps prevent damage to wiring, equipment and downstream components while improving overall electrical safety.
The Z curve characteristic is designed for applications that require rapid tripping at lower short-circuit current levels. This makes the device particularly useful for sensitive electronic circuits, control equipment and installations where fast fault interruption is required.
Typical Applications
- Industrial control panels and automation systems.
- Three-phase auxiliary and control circuits.
- Electrical distribution boards and switchgear assemblies.
- Machine building and OEM equipment.
- Protection of sensitive electronic loads.
- Commercial and industrial low-voltage installations.
Technical Specifications
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| Poles | 3-pole + N | |
|---|---|---|
| Current | 1.6 A | |
| Phase | Three Phase | |
| Device Type | MCB | |
| Trip Curve | Z curve | |
| Manufacturer | ABB | |
| Series | System pro M compact S200M | |
| Model | S203MT-Z1.6NA | |
| Order code | 2CDO273106R0258 | |
| Product type | Miniature circuit breaker | |
| Rated current | 1.6 A | |
| Number of poles | 3 pole | |
| Tripping characteristic | Z curve | |
| Rated operational voltage | 230 / 400 V AC | |
| Frequency | 50 / 60 Hz | |
| Mounting type | DIN rail mounting | |
| Protection function | Overload and short-circuit protection | |
| Application category | Circuit protection | |
| Product range | Modular DIN rail devices |
Frequently Asked Questions
What is the ABB 2CDO273106R0258 used for?
The ABB 2CDO273106R0258 is used to provide overload and short-circuit protection for low-voltage electrical circuits, particularly in control panels, distribution boards and industrial systems.
What is the current rating of this MCB?
This miniature circuit breaker has a rated current of approximately 1.6 A.
How many poles does the ABB S203MT-Z1.6NA have?
The ABB S203MT-Z1.6NA is a 3-pole miniature circuit breaker, making it suitable for three-phase circuit protection.
What does the Z curve mean?
The Z curve indicates a fast tripping characteristic, typically used for sensitive circuits where rapid disconnection is required during short-circuit conditions.
Where is this MCB typically installed?
This MCB is typically installed on DIN rail inside electrical control panels, distribution boards, switchgear cabinets and machinery enclosures.
Trusted by Electrical Engineers Worldwide
ABB System pro M compact miniature circuit breakers are widely used by panel builders, installers and electrical engineers to deliver dependable circuit protection in industrial, commercial and automation applications.
